System for detecting abnormality of yaw rate sensor and lateral acceleration sensor

Abstract

Abnormality of a yaw rate sensor, including a state in which the neutral point is normal, but the sensitivity is abnormal, is detected with high accuracy, irrespective of the situation of a road surface traveled. A lower one of an output from a dividing device for dividing a vehicle speed detected by the vehicle speed detecting device by a minimum radius of turning of a vehicle and an output from a dividing device for dividing a gravitational acceleration by the vehicle speed detected by the vehicle speed detecting device, is selected in a low-select device. It is determined in an abnormality determining device that the yaw rate sensor is abnormal when a yaw rate detected by the yaw rate sensor exceeds a value selected in the low-select device.

What is claimed: 
     
       1. A system for detecting an abnormality of a yaw rate sensor, comprising: a vehicle speed detecting means for detecting a vehicle speed of a vehicle;   a first dividing means for dividing the vehicle speed detected by said vehicle speed detecting means by a minimum turning radius of the vehicle;   a second dividing means for dividing a gravitational acceleration by the vehicle speed detected by said vehicle speed detecting means;   a low-select means for selecting a lower one of outputs from both of said first and second dividing means; and   an abnormality determining means for determining that a yaw rate sensor is abnormal when a yaw rate detected by said yaw rate sensor exceeds a value selected by said low-select means.